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a. FY12-13 GIMPAP Project Proposal Title Page version 04 August 2011

a. FY12-13 GIMPAP Project Proposal Title Page version 04 August 2011. Title : Develop the land surface emissivity (LSE) product from GOES Sounder radiance measurements Status : New Duration : 2 years Project Leads: Zhenglong Li / CIMSS / zhenglong.li@ssec.wisc.edu

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a. FY12-13 GIMPAP Project Proposal Title Page version 04 August 2011

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  1. a. FY12-13 GIMPAP Project Proposal Title Pageversion 04 August 2011 Title: Develop the land surface emissivity (LSE) product from GOES Sounder radiance measurements Status: New Duration: 2 years Project Leads: Zhenglong Li / CIMSS / zhenglong.li@ssec.wisc.edu Other Participants: Yong-Keun Li / CIMSS Collaborators: Jun Li / CIMSS Timothy J. Schmit/ NOAA/NESDIS/STAR

  2. b. Project Summary • Generate the GOES Sounder infrared (IR) land surface emissivity (LSE) product in clear sky conditions • The new product will be generated for three IR channels: ch 6 (12.66 um), ch 7 (12.02 um), and ch 8 (11.03 um)

  3. c. Motivation / Justification • GOES-R requirements exist for LSE • Accurate GOES LSE products are needed by many GOES users • GOES Sounder Products: sounding, land surface temperature, CTP, outgoing LW radiation, etc • Other users: • Modelers who want to assimilate GOES clear sky radiances from window channels • Consistent spectral LSE for assimilating GOES radiances • Radiative transfer model developer, i.e. cRTMand RTTOV • Currently no LSE product from either the GOES Sounder or the Imager • Other LSE database has temporal, spatial and spectral inconsistency for GOES use • GOES LSE will compliment research polar orbiting satellite LSE in temporal, spatial and spectral gaps • We may leverage the GOES-R project with GOES Sounder LSE to verify the GOES-R LSE algorithm

  4. d. Methodology • Using time continuity • LSE does not change within 6 hours while LST changes • Three time steps with a time interval of 3 hours, i.e. t-6, t-3, and t • 1-DVAR physical iteration algorithm • Adapted from GOES-R ABI LSE algorithm, which has been successfully demonstrated with SEVIRI observations • Self cloud contamination detection t(6): t(0)+t(3)+t(6) t(7): t(1)+t(4)+t(7) t(8): t(2)+t(5)+t(8) 0 1 2 3 4 5 6 7 8

  5. The algorithm is applied to SEVIRI observations on August 1 2006. The retrievals are compared with MODIS (collection 4.1), AIRS and IASI monthly LSE databases. Algorithm demonstration: SEVIRI LSE products----8.7 μm MODIS-2006-08 (8.55 μm)

  6. Using MODIS monthly LSE database as reference, other three databases are quantitatively evaluated Algorithm demonstration: Compared with MODIS----8.7 μm Using MODIS as a reference, SEVIRI > operational AIRS ≈ IASI

  7. e. Expected Outcomes • Hourly LSE products of 3 GOES Sounder IR channels (12.66, 12.02, and 11.03 um) in clear sky only • Daily composite of GOES Sounder LSE product • Weekly composite of GOES Sounder LSE product • Monthly composite of GOES Sounder LSE product • Error characteristics of the LSE product • Report findings

  8. e. Possible Path to Operations • CIMSS will provide real time GOES Sounder LSE products as demonstration • Use the GOES Sounder LSE for some GOES research products (soundings and cloud-top pressure) and compare them with the current GOES products to evaluate the impact of LSE • Quantitatively evaluate the GOES Sounder LSE product using the objective method developed by Li et al., 2010. • Under PSDI funding when applicable, we will transfer the GOES LSE algorithm for operation

  9. f. Milestones • Year 1: • Adapt the GOES-R LSE algorithm for GOES Sounder • Apply the algorithm to 1 month of GOES-13 Sounder radiance measurements • Validate the algorithm with both simulated and real GOES Sounder radiances • Report results at the end of the year • Year 2: • Continue to evaluate the GOES LSE product by examining the temporal variation (LSE should have very small temporal variation) • Apply the GOES LSE product to other GOES products that need LSE as input to see if positive impacts are drawn • Apply the algorithm to 1 full year of GOES-13 Sounder radiance measurements and generate daily, weekly and monthly LSE products • Quantitative evaluate GOES LSE product to determine the product precisions • Report results at the end of the year

  10. g. Funding Request (K)

  11. g. Spending Plan FY12 • FY12 $50,000 Total Project Budget • Grant to CI - $50,000 • % FTE - 35 % • Travel - $2,000 (AMS annual meeting) • Publication charge - $3,000 • Federal Travel – $0 • Federal Publication Charges – $0 • Federal Equipment - $0 • Transfers to other agencies – $0 • Other - $0

  12. g. Spending Plan FY13 • FY13 $50,000 Total Project Budget • Grant to CI - $50,000 • % FTE - 35 % • Travel - $2,000 (AMS annual meeting) • Publication charge - $3,000 • Federal Travel – $0 • Federal Publication Charges – $0 • Federal Equipment - $0 • Transfers to other agencies – $0 • Other - $0

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